Mercurial > hg > truffle
annotate src/share/vm/gc_implementation/g1/concurrentMark.hpp @ 17950:8a140676873f
8040804: G1: Concurrent mark stuck in loop calling os::elapsedVTime()
Reviewed-by: brutisso, tschatzl
| author | pliden |
|---|---|
| date | Wed, 14 May 2014 14:32:23 +0200 |
| parents | 58fc1b1523dc |
| children | 52b4284cb496 0982ec23da03 |
| rev | line source |
|---|---|
| 342 | 1 /* |
|
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
2 * Copyright (c) 2001, 2013, Oracle and/or its affiliates. All rights reserved. |
| 342 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
|
1552
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
20 * or visit www.oracle.com if you need additional information or have any |
|
c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
trims
parents:
1394
diff
changeset
|
21 * questions. |
| 342 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_HPP |
| 26 #define SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_HPP | |
| 27 | |
|
17736
58fc1b1523dc
8034079: G1: Refactor the HeapRegionSet hierarchy
brutisso
parents:
12080
diff
changeset
|
28 #include "gc_implementation/g1/heapRegionSet.hpp" |
| 1972 | 29 #include "utilities/taskqueue.hpp" |
| 30 | |
| 342 | 31 class G1CollectedHeap; |
| 32 class CMTask; | |
| 6197 | 33 typedef GenericTaskQueue<oop, mtGC> CMTaskQueue; |
| 34 typedef GenericTaskQueueSet<CMTaskQueue, mtGC> CMTaskQueueSet; | |
| 342 | 35 |
|
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
36 // Closure used by CM during concurrent reference discovery |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
37 // and reference processing (during remarking) to determine |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
38 // if a particular object is alive. It is primarily used |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
39 // to determine if referents of discovered reference objects |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
40 // are alive. An instance is also embedded into the |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
41 // reference processor as the _is_alive_non_header field |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
42 class G1CMIsAliveClosure: public BoolObjectClosure { |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
43 G1CollectedHeap* _g1; |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
44 public: |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
45 G1CMIsAliveClosure(G1CollectedHeap* g1) : _g1(g1) { } |
|
2037
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
46 |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
47 bool do_object_b(oop obj); |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
48 }; |
|
b03260081e9b
7006113: G1: Initialize ReferenceProcessor::_is_alive_non_header field
johnc
parents:
1972
diff
changeset
|
49 |
| 342 | 50 // A generic CM bit map. This is essentially a wrapper around the BitMap |
| 51 // class, with one bit per (1<<_shifter) HeapWords. | |
| 52 | |
|
549
fe3d7c11b4b7
6700941: G1: allocation spec missing for some G1 classes
apetrusenko
parents:
342
diff
changeset
|
53 class CMBitMapRO VALUE_OBJ_CLASS_SPEC { |
| 342 | 54 protected: |
| 55 HeapWord* _bmStartWord; // base address of range covered by map | |
| 56 size_t _bmWordSize; // map size (in #HeapWords covered) | |
| 57 const int _shifter; // map to char or bit | |
| 58 VirtualSpace _virtual_space; // underlying the bit map | |
| 59 BitMap _bm; // the bit map itself | |
| 60 | |
| 61 public: | |
| 62 // constructor | |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
63 CMBitMapRO(int shifter); |
| 342 | 64 |
| 65 enum { do_yield = true }; | |
| 66 | |
| 67 // inquiries | |
| 68 HeapWord* startWord() const { return _bmStartWord; } | |
| 69 size_t sizeInWords() const { return _bmWordSize; } | |
| 70 // the following is one past the last word in space | |
| 71 HeapWord* endWord() const { return _bmStartWord + _bmWordSize; } | |
| 72 | |
| 73 // read marks | |
| 74 | |
| 75 bool isMarked(HeapWord* addr) const { | |
| 76 assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize), | |
| 77 "outside underlying space?"); | |
| 78 return _bm.at(heapWordToOffset(addr)); | |
| 79 } | |
| 80 | |
| 81 // iteration | |
|
4827
2e966d967c5c
7121547: G1: High number mispredicted branches while iterating over the marking bitmap
johnc
parents:
4787
diff
changeset
|
82 inline bool iterate(BitMapClosure* cl, MemRegion mr); |
|
2e966d967c5c
7121547: G1: High number mispredicted branches while iterating over the marking bitmap
johnc
parents:
4787
diff
changeset
|
83 inline bool iterate(BitMapClosure* cl); |
| 342 | 84 |
| 85 // Return the address corresponding to the next marked bit at or after | |
| 86 // "addr", and before "limit", if "limit" is non-NULL. If there is no | |
| 87 // such bit, returns "limit" if that is non-NULL, or else "endWord()". | |
| 88 HeapWord* getNextMarkedWordAddress(HeapWord* addr, | |
| 89 HeapWord* limit = NULL) const; | |
| 90 // Return the address corresponding to the next unmarked bit at or after | |
| 91 // "addr", and before "limit", if "limit" is non-NULL. If there is no | |
| 92 // such bit, returns "limit" if that is non-NULL, or else "endWord()". | |
| 93 HeapWord* getNextUnmarkedWordAddress(HeapWord* addr, | |
| 94 HeapWord* limit = NULL) const; | |
| 95 | |
| 96 // conversion utilities | |
| 97 HeapWord* offsetToHeapWord(size_t offset) const { | |
| 98 return _bmStartWord + (offset << _shifter); | |
| 99 } | |
| 100 size_t heapWordToOffset(HeapWord* addr) const { | |
| 101 return pointer_delta(addr, _bmStartWord) >> _shifter; | |
| 102 } | |
| 103 int heapWordDiffToOffsetDiff(size_t diff) const; | |
|
8733
9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents:
8014
diff
changeset
|
104 |
|
9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents:
8014
diff
changeset
|
105 // The argument addr should be the start address of a valid object |
|
9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents:
8014
diff
changeset
|
106 HeapWord* nextObject(HeapWord* addr) { |
|
9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents:
8014
diff
changeset
|
107 oop obj = (oop) addr; |
|
9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents:
8014
diff
changeset
|
108 HeapWord* res = addr + obj->size(); |
|
9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents:
8014
diff
changeset
|
109 assert(offsetToHeapWord(heapWordToOffset(res)) == res, "sanity"); |
|
9def4075da6d
8008079: G1: Add nextObject routine to CMBitMapRO and replace nextWord
tamao
parents:
8014
diff
changeset
|
110 return res; |
| 342 | 111 } |
| 112 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8788
diff
changeset
|
113 void print_on_error(outputStream* st, const char* prefix) const; |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8788
diff
changeset
|
114 |
| 342 | 115 // debugging |
| 116 NOT_PRODUCT(bool covers(ReservedSpace rs) const;) | |
| 117 }; | |
| 118 | |
| 119 class CMBitMap : public CMBitMapRO { | |
| 120 | |
| 121 public: | |
| 122 // constructor | |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
123 CMBitMap(int shifter) : |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
124 CMBitMapRO(shifter) {} |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
125 |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
126 // Allocates the back store for the marking bitmap |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
127 bool allocate(ReservedSpace heap_rs); |
| 342 | 128 |
| 129 // write marks | |
| 130 void mark(HeapWord* addr) { | |
| 131 assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize), | |
| 132 "outside underlying space?"); | |
| 3771 | 133 _bm.set_bit(heapWordToOffset(addr)); |
| 342 | 134 } |
| 135 void clear(HeapWord* addr) { | |
| 136 assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize), | |
| 137 "outside underlying space?"); | |
| 3771 | 138 _bm.clear_bit(heapWordToOffset(addr)); |
| 342 | 139 } |
| 140 bool parMark(HeapWord* addr) { | |
| 141 assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize), | |
| 142 "outside underlying space?"); | |
| 3771 | 143 return _bm.par_set_bit(heapWordToOffset(addr)); |
| 342 | 144 } |
| 145 bool parClear(HeapWord* addr) { | |
| 146 assert(_bmStartWord <= addr && addr < (_bmStartWord + _bmWordSize), | |
| 147 "outside underlying space?"); | |
| 3771 | 148 return _bm.par_clear_bit(heapWordToOffset(addr)); |
| 342 | 149 } |
| 150 void markRange(MemRegion mr); | |
| 151 void clearAll(); | |
| 152 void clearRange(MemRegion mr); | |
| 153 | |
| 154 // Starting at the bit corresponding to "addr" (inclusive), find the next | |
| 155 // "1" bit, if any. This bit starts some run of consecutive "1"'s; find | |
| 156 // the end of this run (stopping at "end_addr"). Return the MemRegion | |
| 157 // covering from the start of the region corresponding to the first bit | |
| 158 // of the run to the end of the region corresponding to the last bit of | |
| 159 // the run. If there is no "1" bit at or after "addr", return an empty | |
| 160 // MemRegion. | |
| 161 MemRegion getAndClearMarkedRegion(HeapWord* addr, HeapWord* end_addr); | |
| 162 }; | |
| 163 | |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
164 // Represents a marking stack used by ConcurrentMarking in the G1 collector. |
|
549
fe3d7c11b4b7
6700941: G1: allocation spec missing for some G1 classes
apetrusenko
parents:
342
diff
changeset
|
165 class CMMarkStack VALUE_OBJ_CLASS_SPEC { |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
166 VirtualSpace _virtual_space; // Underlying backing store for actual stack |
| 342 | 167 ConcurrentMark* _cm; |
|
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8733
diff
changeset
|
168 oop* _base; // bottom of stack |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
169 jint _index; // one more than last occupied index |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
170 jint _capacity; // max #elements |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
171 jint _saved_index; // value of _index saved at start of GC |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
172 NOT_PRODUCT(jint _max_depth;) // max depth plumbed during run |
| 342 | 173 |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
174 bool _overflow; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
175 bool _should_expand; |
| 342 | 176 DEBUG_ONLY(bool _drain_in_progress;) |
| 177 DEBUG_ONLY(bool _drain_in_progress_yields;) | |
| 178 | |
| 179 public: | |
| 180 CMMarkStack(ConcurrentMark* cm); | |
| 181 ~CMMarkStack(); | |
| 182 | |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
183 #ifndef PRODUCT |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
184 jint max_depth() const { |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
185 return _max_depth; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
186 } |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
187 #endif |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
188 |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
189 bool allocate(size_t capacity); |
| 342 | 190 |
| 191 oop pop() { | |
| 192 if (!isEmpty()) { | |
| 193 return _base[--_index] ; | |
| 194 } | |
| 195 return NULL; | |
| 196 } | |
| 197 | |
| 198 // If overflow happens, don't do the push, and record the overflow. | |
| 199 // *Requires* that "ptr" is already marked. | |
| 200 void push(oop ptr) { | |
| 201 if (isFull()) { | |
| 202 // Record overflow. | |
| 203 _overflow = true; | |
| 204 return; | |
| 205 } else { | |
| 206 _base[_index++] = ptr; | |
| 207 NOT_PRODUCT(_max_depth = MAX2(_max_depth, _index)); | |
| 208 } | |
| 209 } | |
| 210 // Non-block impl. Note: concurrency is allowed only with other | |
| 211 // "par_push" operations, not with "pop" or "drain". We would need | |
| 212 // parallel versions of them if such concurrency was desired. | |
| 213 void par_push(oop ptr); | |
| 214 | |
| 215 // Pushes the first "n" elements of "ptr_arr" on the stack. | |
| 216 // Non-block impl. Note: concurrency is allowed only with other | |
| 217 // "par_adjoin_arr" or "push" operations, not with "pop" or "drain". | |
| 218 void par_adjoin_arr(oop* ptr_arr, int n); | |
| 219 | |
| 220 // Pushes the first "n" elements of "ptr_arr" on the stack. | |
| 221 // Locking impl: concurrency is allowed only with | |
| 222 // "par_push_arr" and/or "par_pop_arr" operations, which use the same | |
| 223 // locking strategy. | |
| 224 void par_push_arr(oop* ptr_arr, int n); | |
| 225 | |
| 226 // If returns false, the array was empty. Otherwise, removes up to "max" | |
| 227 // elements from the stack, and transfers them to "ptr_arr" in an | |
| 228 // unspecified order. The actual number transferred is given in "n" ("n | |
| 229 // == 0" is deliberately redundant with the return value.) Locking impl: | |
| 230 // concurrency is allowed only with "par_push_arr" and/or "par_pop_arr" | |
| 231 // operations, which use the same locking strategy. | |
| 232 bool par_pop_arr(oop* ptr_arr, int max, int* n); | |
| 233 | |
| 234 // Drain the mark stack, applying the given closure to all fields of | |
| 235 // objects on the stack. (That is, continue until the stack is empty, | |
| 236 // even if closure applications add entries to the stack.) The "bm" | |
| 237 // argument, if non-null, may be used to verify that only marked objects | |
| 238 // are on the mark stack. If "yield_after" is "true", then the | |
| 239 // concurrent marker performing the drain offers to yield after | |
| 240 // processing each object. If a yield occurs, stops the drain operation | |
| 241 // and returns false. Otherwise, returns true. | |
| 242 template<class OopClosureClass> | |
| 243 bool drain(OopClosureClass* cl, CMBitMap* bm, bool yield_after = false); | |
| 244 | |
| 245 bool isEmpty() { return _index == 0; } | |
| 246 bool isFull() { return _index == _capacity; } | |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
247 int maxElems() { return _capacity; } |
| 342 | 248 |
| 249 bool overflow() { return _overflow; } | |
| 250 void clear_overflow() { _overflow = false; } | |
| 251 | |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
252 bool should_expand() const { return _should_expand; } |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
253 void set_should_expand(); |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
254 |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
255 // Expand the stack, typically in response to an overflow condition |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
256 void expand(); |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
257 |
| 342 | 258 int size() { return _index; } |
| 259 | |
| 260 void setEmpty() { _index = 0; clear_overflow(); } | |
| 261 | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
262 // Record the current index. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
263 void note_start_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
264 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
265 // Make sure that we have not added any entries to the stack during GC. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
266 void note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
267 |
| 342 | 268 // iterate over the oops in the mark stack, up to the bound recorded via |
| 269 // the call above. | |
| 270 void oops_do(OopClosure* f); | |
| 271 }; | |
| 272 | |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
273 class ForceOverflowSettings VALUE_OBJ_CLASS_SPEC { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
274 private: |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
275 #ifndef PRODUCT |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
276 uintx _num_remaining; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
277 bool _force; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
278 #endif // !defined(PRODUCT) |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
279 |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
280 public: |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
281 void init() PRODUCT_RETURN; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
282 void update() PRODUCT_RETURN; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
283 bool should_force() PRODUCT_RETURN_( return false; ); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
284 }; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
285 |
| 342 | 286 // this will enable a variety of different statistics per GC task |
| 287 #define _MARKING_STATS_ 0 | |
| 288 // this will enable the higher verbose levels | |
| 289 #define _MARKING_VERBOSE_ 0 | |
| 290 | |
| 291 #if _MARKING_STATS_ | |
| 292 #define statsOnly(statement) \ | |
| 293 do { \ | |
| 294 statement ; \ | |
| 295 } while (0) | |
| 296 #else // _MARKING_STATS_ | |
| 297 #define statsOnly(statement) \ | |
| 298 do { \ | |
| 299 } while (0) | |
| 300 #endif // _MARKING_STATS_ | |
| 301 | |
| 302 typedef enum { | |
| 303 no_verbose = 0, // verbose turned off | |
| 304 stats_verbose, // only prints stats at the end of marking | |
| 305 low_verbose, // low verbose, mostly per region and per major event | |
| 306 medium_verbose, // a bit more detailed than low | |
| 307 high_verbose // per object verbose | |
| 308 } CMVerboseLevel; | |
| 309 | |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
310 class YoungList; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
311 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
312 // Root Regions are regions that are not empty at the beginning of a |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
313 // marking cycle and which we might collect during an evacuation pause |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
314 // while the cycle is active. Given that, during evacuation pauses, we |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
315 // do not copy objects that are explicitly marked, what we have to do |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
316 // for the root regions is to scan them and mark all objects reachable |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
317 // from them. According to the SATB assumptions, we only need to visit |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
318 // each object once during marking. So, as long as we finish this scan |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
319 // before the next evacuation pause, we can copy the objects from the |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
320 // root regions without having to mark them or do anything else to them. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
321 // |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
322 // Currently, we only support root region scanning once (at the start |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
323 // of the marking cycle) and the root regions are all the survivor |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
324 // regions populated during the initial-mark pause. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
325 class CMRootRegions VALUE_OBJ_CLASS_SPEC { |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
326 private: |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
327 YoungList* _young_list; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
328 ConcurrentMark* _cm; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
329 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
330 volatile bool _scan_in_progress; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
331 volatile bool _should_abort; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
332 HeapRegion* volatile _next_survivor; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
333 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
334 public: |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
335 CMRootRegions(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
336 // We actually do most of the initialization in this method. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
337 void init(G1CollectedHeap* g1h, ConcurrentMark* cm); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
338 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
339 // Reset the claiming / scanning of the root regions. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
340 void prepare_for_scan(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
341 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
342 // Forces get_next() to return NULL so that the iteration aborts early. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
343 void abort() { _should_abort = true; } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
344 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
345 // Return true if the CM thread are actively scanning root regions, |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
346 // false otherwise. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
347 bool scan_in_progress() { return _scan_in_progress; } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
348 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
349 // Claim the next root region to scan atomically, or return NULL if |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
350 // all have been claimed. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
351 HeapRegion* claim_next(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
352 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
353 // Flag that we're done with root region scanning and notify anyone |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
354 // who's waiting on it. If aborted is false, assume that all regions |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
355 // have been claimed. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
356 void scan_finished(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
357 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
358 // If CM threads are still scanning root regions, wait until they |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
359 // are done. Return true if we had to wait, false otherwise. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
360 bool wait_until_scan_finished(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
361 }; |
| 342 | 362 |
| 363 class ConcurrentMarkThread; | |
| 364 | |
| 6197 | 365 class ConcurrentMark: public CHeapObj<mtGC> { |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
366 friend class CMMarkStack; |
| 342 | 367 friend class ConcurrentMarkThread; |
| 368 friend class CMTask; | |
| 369 friend class CMBitMapClosure; | |
| 370 friend class CMGlobalObjectClosure; | |
| 371 friend class CMRemarkTask; | |
| 372 friend class CMConcurrentMarkingTask; | |
| 373 friend class G1ParNoteEndTask; | |
| 374 friend class CalcLiveObjectsClosure; | |
|
3979
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3867
diff
changeset
|
375 friend class G1CMRefProcTaskProxy; |
|
4dfb2df418f2
6484982: G1: process references during evacuation pauses
johnc
parents:
3867
diff
changeset
|
376 friend class G1CMRefProcTaskExecutor; |
|
8014
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
377 friend class G1CMKeepAliveAndDrainClosure; |
|
f90b9bceb8e5
8005032: G1: Cleanup serial reference processing closures in concurrent marking
johnc
parents:
8008
diff
changeset
|
378 friend class G1CMDrainMarkingStackClosure; |
| 342 | 379 |
| 380 protected: | |
| 381 ConcurrentMarkThread* _cmThread; // the thread doing the work | |
| 382 G1CollectedHeap* _g1h; // the heap. | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
383 uint _parallel_marking_threads; // the number of marking |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
3979
diff
changeset
|
384 // threads we're use |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
385 uint _max_parallel_marking_threads; // max number of marking |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
3979
diff
changeset
|
386 // threads we'll ever use |
| 342 | 387 double _sleep_factor; // how much we have to sleep, with |
| 388 // respect to the work we just did, to | |
| 389 // meet the marking overhead goal | |
| 390 double _marking_task_overhead; // marking target overhead for | |
| 391 // a single task | |
| 392 | |
| 393 // same as the two above, but for the cleanup task | |
| 394 double _cleanup_sleep_factor; | |
| 395 double _cleanup_task_overhead; | |
| 396 | |
| 2152 | 397 FreeRegionList _cleanup_list; |
| 342 | 398 |
|
4828
851b58c26def
7130334: G1: Change comments and error messages that refer to CMS in g1/concurrentMark.cpp/hpp
brutisso
parents:
4827
diff
changeset
|
399 // Concurrent marking support structures |
| 342 | 400 CMBitMap _markBitMap1; |
| 401 CMBitMap _markBitMap2; | |
| 402 CMBitMapRO* _prevMarkBitMap; // completed mark bitmap | |
| 403 CMBitMap* _nextMarkBitMap; // under-construction mark bitmap | |
| 404 | |
| 405 BitMap _region_bm; | |
| 406 BitMap _card_bm; | |
| 407 | |
| 408 // Heap bounds | |
| 409 HeapWord* _heap_start; | |
| 410 HeapWord* _heap_end; | |
| 411 | |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
412 // Root region tracking and claiming. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
413 CMRootRegions _root_regions; |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
414 |
| 342 | 415 // For gray objects |
| 416 CMMarkStack _markStack; // Grey objects behind global finger. | |
| 417 HeapWord* volatile _finger; // the global finger, region aligned, | |
| 418 // always points to the end of the | |
| 419 // last claimed region | |
| 420 | |
| 421 // marking tasks | |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
422 uint _max_worker_id;// maximum worker id |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
423 uint _active_tasks; // task num currently active |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
424 CMTask** _tasks; // task queue array (max_worker_id len) |
| 342 | 425 CMTaskQueueSet* _task_queues; // task queue set |
| 426 ParallelTaskTerminator _terminator; // for termination | |
| 427 | |
| 428 // Two sync barriers that are used to synchronise tasks when an | |
| 429 // overflow occurs. The algorithm is the following. All tasks enter | |
| 430 // the first one to ensure that they have all stopped manipulating | |
| 431 // the global data structures. After they exit it, they re-initialise | |
| 432 // their data structures and task 0 re-initialises the global data | |
| 433 // structures. Then, they enter the second sync barrier. This | |
| 434 // ensure, that no task starts doing work before all data | |
| 435 // structures (local and global) have been re-initialised. When they | |
| 436 // exit it, they are free to start working again. | |
| 437 WorkGangBarrierSync _first_overflow_barrier_sync; | |
| 438 WorkGangBarrierSync _second_overflow_barrier_sync; | |
| 439 | |
| 440 // this is set by any task, when an overflow on the global data | |
| 441 // structures is detected. | |
| 442 volatile bool _has_overflown; | |
| 443 // true: marking is concurrent, false: we're in remark | |
| 444 volatile bool _concurrent; | |
| 445 // set at the end of a Full GC so that marking aborts | |
| 446 volatile bool _has_aborted; | |
|
1835
4805b9f4779e
6941395: G1: Use only lock-free versions of region stack push() and pop()
johnc
parents:
1552
diff
changeset
|
447 |
| 342 | 448 // used when remark aborts due to an overflow to indicate that |
| 449 // another concurrent marking phase should start | |
| 450 volatile bool _restart_for_overflow; | |
| 451 | |
| 452 // This is true from the very start of concurrent marking until the | |
| 453 // point when all the tasks complete their work. It is really used | |
| 454 // to determine the points between the end of concurrent marking and | |
| 455 // time of remark. | |
| 456 volatile bool _concurrent_marking_in_progress; | |
| 457 | |
| 458 // verbose level | |
| 459 CMVerboseLevel _verbose_level; | |
| 460 | |
| 461 // All of these times are in ms. | |
| 462 NumberSeq _init_times; | |
| 463 NumberSeq _remark_times; | |
| 464 NumberSeq _remark_mark_times; | |
| 465 NumberSeq _remark_weak_ref_times; | |
| 466 NumberSeq _cleanup_times; | |
| 467 double _total_counting_time; | |
| 468 double _total_rs_scrub_time; | |
| 469 | |
| 470 double* _accum_task_vtime; // accumulated task vtime | |
| 471 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
3979
diff
changeset
|
472 FlexibleWorkGang* _parallel_workers; |
| 342 | 473 |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
474 ForceOverflowSettings _force_overflow_conc; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
475 ForceOverflowSettings _force_overflow_stw; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
476 |
| 342 | 477 void weakRefsWork(bool clear_all_soft_refs); |
| 478 | |
| 479 void swapMarkBitMaps(); | |
| 480 | |
| 481 // It resets the global marking data structures, as well as the | |
| 482 // task local ones; should be called during initial mark. | |
| 483 void reset(); | |
|
7450
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
484 |
|
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
485 // Resets all the marking data structures. Called when we have to restart |
|
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
486 // marking or when marking completes (via set_non_marking_state below). |
|
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
487 void reset_marking_state(bool clear_overflow = true); |
|
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
488 |
|
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
489 // We do this after we're done with marking so that the marking data |
|
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
490 // structures are initialised to a sensible and predictable state. |
|
d275c3dc73e6
8004816: G1: Kitchensink failures after marking stack changes
johnc
parents:
7397
diff
changeset
|
491 void set_non_marking_state(); |
| 342 | 492 |
|
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
493 // Called to indicate how many threads are currently active. |
|
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
494 void set_concurrency(uint active_tasks); |
|
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
495 |
| 342 | 496 // It should be called to indicate which phase we're in (concurrent |
| 497 // mark or remark) and how many threads are currently active. | |
|
8788
e864cc14ca75
8009940: G1: assert(_finger == _heap_end) failed, concurrentMark.cpp:809
johnc
parents:
8787
diff
changeset
|
498 void set_concurrency_and_phase(uint active_tasks, bool concurrent); |
| 342 | 499 |
| 500 // prints all gathered CM-related statistics | |
| 501 void print_stats(); | |
| 502 | |
| 2152 | 503 bool cleanup_list_is_empty() { |
| 504 return _cleanup_list.is_empty(); | |
| 505 } | |
| 506 | |
| 342 | 507 // accessor methods |
|
8008
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
508 uint parallel_marking_threads() const { return _parallel_marking_threads; } |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
509 uint max_parallel_marking_threads() const { return _max_parallel_marking_threads;} |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
510 double sleep_factor() { return _sleep_factor; } |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
511 double marking_task_overhead() { return _marking_task_overhead;} |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
512 double cleanup_sleep_factor() { return _cleanup_sleep_factor; } |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
513 double cleanup_task_overhead() { return _cleanup_task_overhead;} |
| 342 | 514 |
|
8008
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
515 bool use_parallel_marking_threads() const { |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
516 assert(parallel_marking_threads() <= |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
517 max_parallel_marking_threads(), "sanity"); |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
518 assert((_parallel_workers == NULL && parallel_marking_threads() == 0) || |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
519 parallel_marking_threads() > 0, |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
520 "parallel workers not set up correctly"); |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
521 return _parallel_workers != NULL; |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
522 } |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
523 |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
524 HeapWord* finger() { return _finger; } |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
525 bool concurrent() { return _concurrent; } |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
526 uint active_tasks() { return _active_tasks; } |
|
256d3f43c177
8005875: G1: Kitchensink fails with ParallelGCThreads=0
johnc
parents:
7450
diff
changeset
|
527 ParallelTaskTerminator* terminator() { return &_terminator; } |
| 342 | 528 |
| 529 // It claims the next available region to be scanned by a marking | |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
530 // task/thread. It might return NULL if the next region is empty or |
|
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
531 // we have run out of regions. In the latter case, out_of_regions() |
| 342 | 532 // determines whether we've really run out of regions or the task |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
533 // should call claim_region() again. This might seem a bit |
| 342 | 534 // awkward. Originally, the code was written so that claim_region() |
| 535 // either successfully returned with a non-empty region or there | |
| 536 // were no more regions to be claimed. The problem with this was | |
| 537 // that, in certain circumstances, it iterated over large chunks of | |
| 538 // the heap finding only empty regions and, while it was working, it | |
| 539 // was preventing the calling task to call its regular clock | |
| 540 // method. So, this way, each task will spend very little time in | |
| 541 // claim_region() and is allowed to call the regular clock method | |
| 542 // frequently. | |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
543 HeapRegion* claim_region(uint worker_id); |
| 342 | 544 |
|
17950
8a140676873f
8040804: G1: Concurrent mark stuck in loop calling os::elapsedVTime()
pliden
parents:
17736
diff
changeset
|
545 // It determines whether we've run out of regions to scan. Note that |
|
8a140676873f
8040804: G1: Concurrent mark stuck in loop calling os::elapsedVTime()
pliden
parents:
17736
diff
changeset
|
546 // the finger can point past the heap end in case the heap was expanded |
|
8a140676873f
8040804: G1: Concurrent mark stuck in loop calling os::elapsedVTime()
pliden
parents:
17736
diff
changeset
|
547 // to satisfy an allocation without doing a GC. This is fine, because all |
|
8a140676873f
8040804: G1: Concurrent mark stuck in loop calling os::elapsedVTime()
pliden
parents:
17736
diff
changeset
|
548 // objects in those regions will be considered live anyway because of |
|
8a140676873f
8040804: G1: Concurrent mark stuck in loop calling os::elapsedVTime()
pliden
parents:
17736
diff
changeset
|
549 // SATB guarantees (i.e. their TAMS will be equal to bottom). |
|
8a140676873f
8040804: G1: Concurrent mark stuck in loop calling os::elapsedVTime()
pliden
parents:
17736
diff
changeset
|
550 bool out_of_regions() { return _finger >= _heap_end; } |
| 342 | 551 |
| 552 // Returns the task with the given id | |
| 553 CMTask* task(int id) { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1019
diff
changeset
|
554 assert(0 <= id && id < (int) _active_tasks, |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1019
diff
changeset
|
555 "task id not within active bounds"); |
| 342 | 556 return _tasks[id]; |
| 557 } | |
| 558 | |
| 559 // Returns the task queue with the given id | |
| 560 CMTaskQueue* task_queue(int id) { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1019
diff
changeset
|
561 assert(0 <= id && id < (int) _active_tasks, |
|
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1019
diff
changeset
|
562 "task queue id not within active bounds"); |
| 342 | 563 return (CMTaskQueue*) _task_queues->queue(id); |
| 564 } | |
| 565 | |
| 566 // Returns the task queue set | |
| 567 CMTaskQueueSet* task_queues() { return _task_queues; } | |
| 568 | |
| 569 // Access / manipulation of the overflow flag which is set to | |
|
5988
2a0172480595
7127697: G1: remove dead code after recent concurrent mark changes
tonyp
parents:
4837
diff
changeset
|
570 // indicate that the global stack has overflown |
| 342 | 571 bool has_overflown() { return _has_overflown; } |
| 572 void set_has_overflown() { _has_overflown = true; } | |
| 573 void clear_has_overflown() { _has_overflown = false; } | |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
574 bool restart_for_overflow() { return _restart_for_overflow; } |
| 342 | 575 |
| 576 // Methods to enter the two overflow sync barriers | |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
577 void enter_first_sync_barrier(uint worker_id); |
|
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
578 void enter_second_sync_barrier(uint worker_id); |
| 342 | 579 |
|
3316
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
580 ForceOverflowSettings* force_overflow_conc() { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
581 return &_force_overflow_conc; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
582 } |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
583 |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
584 ForceOverflowSettings* force_overflow_stw() { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
585 return &_force_overflow_stw; |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
586 } |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
587 |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
588 ForceOverflowSettings* force_overflow() { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
589 if (concurrent()) { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
590 return force_overflow_conc(); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
591 } else { |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
592 return force_overflow_stw(); |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
593 } |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
594 } |
|
cd8e33b2a8ad
7034139: G1: assert(Thread::current()->is_ConcurrentGC_thread()) failed: only a conc GC thread can call this.
tonyp
parents:
2435
diff
changeset
|
595 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
596 // Live Data Counting data structures... |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
597 // These data structures are initialized at the start of |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
598 // marking. They are written to while marking is active. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
599 // They are aggregated during remark; the aggregated values |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
600 // are then used to populate the _region_bm, _card_bm, and |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
601 // the total live bytes, which are then subsequently updated |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
602 // during cleanup. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
603 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
604 // An array of bitmaps (one bit map per task). Each bitmap |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
605 // is used to record the cards spanned by the live objects |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
606 // marked by that task/worker. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
607 BitMap* _count_card_bitmaps; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
608 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
609 // Used to record the number of marked live bytes |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
610 // (for each region, by worker thread). |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
611 size_t** _count_marked_bytes; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
612 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
613 // Card index of the bottom of the G1 heap. Used for biasing indices into |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
614 // the card bitmaps. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
615 intptr_t _heap_bottom_card_num; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
616 |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
617 // Set to true when initialization is complete |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
618 bool _completed_initialization; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
619 |
| 342 | 620 public: |
| 621 // Manipulation of the global mark stack. | |
| 622 // Notice that the first mark_stack_push is CAS-based, whereas the | |
| 623 // two below are Mutex-based. This is OK since the first one is only | |
| 624 // called during evacuation pauses and doesn't compete with the | |
| 625 // other two (which are called by the marking tasks during | |
| 626 // concurrent marking or remark). | |
| 627 bool mark_stack_push(oop p) { | |
| 628 _markStack.par_push(p); | |
| 629 if (_markStack.overflow()) { | |
| 630 set_has_overflown(); | |
| 631 return false; | |
| 632 } | |
| 633 return true; | |
| 634 } | |
| 635 bool mark_stack_push(oop* arr, int n) { | |
| 636 _markStack.par_push_arr(arr, n); | |
| 637 if (_markStack.overflow()) { | |
| 638 set_has_overflown(); | |
| 639 return false; | |
| 640 } | |
| 641 return true; | |
| 642 } | |
| 643 void mark_stack_pop(oop* arr, int max, int* n) { | |
| 644 _markStack.par_pop_arr(arr, max, n); | |
| 645 } | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
646 size_t mark_stack_size() { return _markStack.size(); } |
| 342 | 647 size_t partial_mark_stack_size_target() { return _markStack.maxElems()/3; } |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
648 bool mark_stack_overflow() { return _markStack.overflow(); } |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
649 bool mark_stack_empty() { return _markStack.isEmpty(); } |
| 342 | 650 |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
651 CMRootRegions* root_regions() { return &_root_regions; } |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
652 |
| 342 | 653 bool concurrent_marking_in_progress() { |
| 654 return _concurrent_marking_in_progress; | |
| 655 } | |
| 656 void set_concurrent_marking_in_progress() { | |
| 657 _concurrent_marking_in_progress = true; | |
| 658 } | |
| 659 void clear_concurrent_marking_in_progress() { | |
| 660 _concurrent_marking_in_progress = false; | |
| 661 } | |
| 662 | |
| 663 void update_accum_task_vtime(int i, double vtime) { | |
| 664 _accum_task_vtime[i] += vtime; | |
| 665 } | |
| 666 | |
| 667 double all_task_accum_vtime() { | |
| 668 double ret = 0.0; | |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
669 for (uint i = 0; i < _max_worker_id; ++i) |
| 342 | 670 ret += _accum_task_vtime[i]; |
| 671 return ret; | |
| 672 } | |
| 673 | |
| 674 // Attempts to steal an object from the task queues of other tasks | |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
675 bool try_stealing(uint worker_id, int* hash_seed, oop& obj) { |
|
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
676 return _task_queues->steal(worker_id, hash_seed, obj); |
| 342 | 677 } |
| 678 | |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
679 ConcurrentMark(G1CollectedHeap* g1h, ReservedSpace heap_rs); |
| 342 | 680 ~ConcurrentMark(); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
681 |
| 342 | 682 ConcurrentMarkThread* cmThread() { return _cmThread; } |
| 683 | |
| 684 CMBitMapRO* prevMarkBitMap() const { return _prevMarkBitMap; } | |
| 685 CMBitMap* nextMarkBitMap() const { return _nextMarkBitMap; } | |
| 686 | |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
3979
diff
changeset
|
687 // Returns the number of GC threads to be used in a concurrent |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
3979
diff
changeset
|
688 // phase based on the number of GC threads being used in a STW |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
3979
diff
changeset
|
689 // phase. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
690 uint scale_parallel_threads(uint n_par_threads); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
3979
diff
changeset
|
691 |
|
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
3979
diff
changeset
|
692 // Calculates the number of GC threads to be used in a concurrent phase. |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
693 uint calc_parallel_marking_threads(); |
|
4095
bca17e38de00
6593758: RFE: Enhance GC ergonomics to dynamically choose ParallelGCThreads
jmasa
parents:
3979
diff
changeset
|
694 |
| 342 | 695 // The following three are interaction between CM and |
| 696 // G1CollectedHeap | |
| 697 | |
| 698 // This notifies CM that a root during initial-mark needs to be | |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
699 // grayed. It is MT-safe. word_size is the size of the object in |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
700 // words. It is passed explicitly as sometimes we cannot calculate |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
701 // it from the given object because it might be in an inconsistent |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
702 // state (e.g., in to-space and being copied). So the caller is |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
703 // responsible for dealing with this issue (e.g., get the size from |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
704 // the from-space image when the to-space image might be |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
705 // inconsistent) and always passing the size. hr is the region that |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
706 // contains the object and it's passed optionally from callers who |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
707 // might already have it (no point in recalculating it). |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
708 inline void grayRoot(oop obj, size_t word_size, |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
709 uint worker_id, HeapRegion* hr = NULL); |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
710 |
| 1388 | 711 // It iterates over the heap and for each object it comes across it |
| 712 // will dump the contents of its reference fields, as well as | |
| 713 // liveness information for the object and its referents. The dump | |
| 714 // will be written to a file with the following name: | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
715 // G1PrintReachableBaseFile + "." + str. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
716 // vo decides whether the prev (vo == UsePrevMarking), the next |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
717 // (vo == UseNextMarking) marking information, or the mark word |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
718 // (vo == UseMarkWord) will be used to determine the liveness of |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
719 // each object / referent. |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
720 // If all is true, all objects in the heap will be dumped, otherwise |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
721 // only the live ones. In the dump the following symbols / breviations |
|
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
722 // are used: |
| 1388 | 723 // M : an explicitly live object (its bitmap bit is set) |
| 724 // > : an implicitly live object (over tams) | |
| 725 // O : an object outside the G1 heap (typically: in the perm gen) | |
| 726 // NOT : a reference field whose referent is not live | |
| 727 // AND MARKED : indicates that an object is both explicitly and | |
| 728 // implicitly live (it should be one or the other, not both) | |
| 729 void print_reachable(const char* str, | |
|
3772
6747fd0512e0
7004681: G1: Extend marking verification to Full GCs
johnc
parents:
3771
diff
changeset
|
730 VerifyOption vo, bool all) PRODUCT_RETURN; |
| 342 | 731 |
| 732 // Clear the next marking bitmap (will be called concurrently). | |
| 733 void clearNextBitmap(); | |
| 734 | |
| 735 // These two do the work that needs to be done before and after the | |
| 736 // initial root checkpoint. Since this checkpoint can be done at two | |
| 737 // different points (i.e. an explicit pause or piggy-backed on a | |
| 738 // young collection), then it's nice to be able to easily share the | |
| 739 // pre/post code. It might be the case that we can put everything in | |
| 740 // the post method. TP | |
| 741 void checkpointRootsInitialPre(); | |
| 742 void checkpointRootsInitialPost(); | |
| 743 | |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
744 // Scan all the root regions and mark everything reachable from |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
745 // them. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
746 void scanRootRegions(); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
747 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
748 // Scan a single root region and mark everything reachable from it. |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
749 void scanRootRegion(HeapRegion* hr, uint worker_id); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
750 |
| 342 | 751 // Do concurrent phase of marking, to a tentative transitive closure. |
| 752 void markFromRoots(); | |
| 753 | |
| 754 void checkpointRootsFinal(bool clear_all_soft_refs); | |
| 755 void checkpointRootsFinalWork(); | |
| 756 void cleanup(); | |
| 757 void completeCleanup(); | |
| 758 | |
| 759 // Mark in the previous bitmap. NB: this is usually read-only, so use | |
| 760 // this carefully! | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
761 inline void markPrev(oop p); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
762 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
763 // Clears marks for all objects in the given range, for the prev, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
764 // next, or both bitmaps. NB: the previous bitmap is usually |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
765 // read-only, so use this carefully! |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
766 void clearRangePrevBitmap(MemRegion mr); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
767 void clearRangeNextBitmap(MemRegion mr); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
768 void clearRangeBothBitmaps(MemRegion mr); |
| 342 | 769 |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
770 // Notify data structures that a GC has started. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
771 void note_start_of_gc() { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
772 _markStack.note_start_of_gc(); |
| 342 | 773 } |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
774 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
775 // Notify data structures that a GC is finished. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
776 void note_end_of_gc() { |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
777 _markStack.note_end_of_gc(); |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
778 } |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
779 |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
780 // Verify that there are no CSet oops on the stacks (taskqueues / |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
781 // global mark stack), enqueued SATB buffers, per-thread SATB |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
782 // buffers, and fingers (global / per-task). The boolean parameters |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
783 // decide which of the above data structures to verify. If marking |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
784 // is not in progress, it's a no-op. |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
785 void verify_no_cset_oops(bool verify_stacks, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
786 bool verify_enqueued_buffers, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
787 bool verify_thread_buffers, |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
788 bool verify_fingers) PRODUCT_RETURN; |
|
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
789 |
| 342 | 790 // It is called at the end of an evacuation pause during marking so |
| 791 // that CM is notified of where the new end of the heap is. It | |
| 792 // doesn't do anything if concurrent_marking_in_progress() is false, | |
| 793 // unless the force parameter is true. | |
| 794 void update_g1_committed(bool force = false); | |
| 795 | |
| 796 bool isMarked(oop p) const { | |
| 797 assert(p != NULL && p->is_oop(), "expected an oop"); | |
| 798 HeapWord* addr = (HeapWord*)p; | |
| 799 assert(addr >= _nextMarkBitMap->startWord() || | |
| 800 addr < _nextMarkBitMap->endWord(), "in a region"); | |
| 801 | |
| 802 return _nextMarkBitMap->isMarked(addr); | |
| 803 } | |
| 804 | |
| 805 inline bool not_yet_marked(oop p) const; | |
| 806 | |
| 807 // XXX Debug code | |
| 808 bool containing_card_is_marked(void* p); | |
| 809 bool containing_cards_are_marked(void* start, void* last); | |
| 810 | |
| 811 bool isPrevMarked(oop p) const { | |
| 812 assert(p != NULL && p->is_oop(), "expected an oop"); | |
| 813 HeapWord* addr = (HeapWord*)p; | |
| 814 assert(addr >= _prevMarkBitMap->startWord() || | |
| 815 addr < _prevMarkBitMap->endWord(), "in a region"); | |
| 816 | |
| 817 return _prevMarkBitMap->isMarked(addr); | |
| 818 } | |
| 819 | |
|
4728
441e946dc1af
7121618: Change type of number of GC workers to unsigned int.
jmasa
parents:
4711
diff
changeset
|
820 inline bool do_yield_check(uint worker_i = 0); |
| 342 | 821 inline bool should_yield(); |
| 822 | |
| 823 // Called to abort the marking cycle after a Full GC takes palce. | |
| 824 void abort(); | |
| 825 | |
| 10405 | 826 bool has_aborted() { return _has_aborted; } |
| 827 | |
| 342 | 828 // This prints the global/local fingers. It is used for debugging. |
| 829 NOT_PRODUCT(void print_finger();) | |
| 830 | |
| 831 void print_summary_info(); | |
| 832 | |
| 1019 | 833 void print_worker_threads_on(outputStream* st) const; |
| 834 | |
|
9076
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8788
diff
changeset
|
835 void print_on_error(outputStream* st) const; |
|
7b835924c31c
8011872: Include Bit Map addresses in the hs_err files
stefank
parents:
8788
diff
changeset
|
836 |
| 342 | 837 // The following indicate whether a given verbose level has been |
| 838 // set. Notice that anything above stats is conditional to | |
| 839 // _MARKING_VERBOSE_ having been set to 1 | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
840 bool verbose_stats() { |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
841 return _verbose_level >= stats_verbose; |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
842 } |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
843 bool verbose_low() { |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
844 return _MARKING_VERBOSE_ && _verbose_level >= low_verbose; |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
845 } |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
846 bool verbose_medium() { |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
847 return _MARKING_VERBOSE_ && _verbose_level >= medium_verbose; |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
848 } |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
849 bool verbose_high() { |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
850 return _MARKING_VERBOSE_ && _verbose_level >= high_verbose; |
|
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
851 } |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
852 |
|
6812
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6197
diff
changeset
|
853 // Liveness counting |
|
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6197
diff
changeset
|
854 |
|
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6197
diff
changeset
|
855 // Utility routine to set an exclusive range of cards on the given |
|
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6197
diff
changeset
|
856 // card liveness bitmap |
|
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6197
diff
changeset
|
857 inline void set_card_bitmap_range(BitMap* card_bm, |
|
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6197
diff
changeset
|
858 BitMap::idx_t start_idx, |
|
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6197
diff
changeset
|
859 BitMap::idx_t end_idx, |
|
988bf00cc564
7200261: G1: Liveness counting inconsistencies during marking verification
johnc
parents:
6197
diff
changeset
|
860 bool is_par); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
861 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
862 // Returns the card number of the bottom of the G1 heap. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
863 // Used in biasing indices into accounting card bitmaps. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
864 intptr_t heap_bottom_card_num() const { |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
865 return _heap_bottom_card_num; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
866 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
867 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
868 // Returns the card bitmap for a given task or worker id. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
869 BitMap* count_card_bitmap_for(uint worker_id) { |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
870 assert(0 <= worker_id && worker_id < _max_worker_id, "oob"); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
871 assert(_count_card_bitmaps != NULL, "uninitialized"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
872 BitMap* task_card_bm = &_count_card_bitmaps[worker_id]; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
873 assert(task_card_bm->size() == _card_bm.size(), "size mismatch"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
874 return task_card_bm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
875 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
876 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
877 // Returns the array containing the marked bytes for each region, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
878 // for the given worker or task id. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
879 size_t* count_marked_bytes_array_for(uint worker_id) { |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
880 assert(0 <= worker_id && worker_id < _max_worker_id, "oob"); |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
881 assert(_count_marked_bytes != NULL, "uninitialized"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
882 size_t* marked_bytes_array = _count_marked_bytes[worker_id]; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
883 assert(marked_bytes_array != NULL, "uninitialized"); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
884 return marked_bytes_array; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
885 } |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
886 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
887 // Returns the index in the liveness accounting card table bitmap |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
888 // for the given address |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
889 inline BitMap::idx_t card_bitmap_index_for(HeapWord* addr); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
890 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
891 // Counts the size of the given memory region in the the given |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
892 // marked_bytes array slot for the given HeapRegion. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
893 // Sets the bits in the given card bitmap that are associated with the |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
894 // cards that are spanned by the memory region. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
895 inline void count_region(MemRegion mr, HeapRegion* hr, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
896 size_t* marked_bytes_array, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
897 BitMap* task_card_bm); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
898 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
899 // Counts the given memory region in the task/worker counting |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
900 // data structures for the given worker id. |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
901 inline void count_region(MemRegion mr, HeapRegion* hr, uint worker_id); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
902 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
903 // Counts the given memory region in the task/worker counting |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
904 // data structures for the given worker id. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
905 inline void count_region(MemRegion mr, uint worker_id); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
906 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
907 // Counts the given object in the given task/worker counting |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
908 // data structures. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
909 inline void count_object(oop obj, HeapRegion* hr, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
910 size_t* marked_bytes_array, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
911 BitMap* task_card_bm); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
912 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
913 // Counts the given object in the task/worker counting data |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
914 // structures for the given worker id. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
915 inline void count_object(oop obj, HeapRegion* hr, uint worker_id); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
916 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
917 // Attempts to mark the given object and, if successful, counts |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
918 // the object in the given task/worker counting structures. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
919 inline bool par_mark_and_count(oop obj, HeapRegion* hr, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
920 size_t* marked_bytes_array, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
921 BitMap* task_card_bm); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
922 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
923 // Attempts to mark the given object and, if successful, counts |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
924 // the object in the task/worker counting structures for the |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
925 // given worker id. |
|
4837
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
926 inline bool par_mark_and_count(oop obj, size_t word_size, |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
927 HeapRegion* hr, uint worker_id); |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
928 |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
929 // Attempts to mark the given object and, if successful, counts |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
930 // the object in the task/worker counting structures for the |
|
eff609af17d7
7127706: G1: re-enable survivors during the initial-mark pause
tonyp
parents:
4836
diff
changeset
|
931 // given worker id. |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
932 inline bool par_mark_and_count(oop obj, HeapRegion* hr, uint worker_id); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
933 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
934 // Similar to the above routine but we don't know the heap region that |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
935 // contains the object to be marked/counted, which this routine looks up. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
936 inline bool par_mark_and_count(oop obj, uint worker_id); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
937 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
938 // Similar to the above routine but there are times when we cannot |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
939 // safely calculate the size of obj due to races and we, therefore, |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
940 // pass the size in as a parameter. It is the caller's reponsibility |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
941 // to ensure that the size passed in for obj is valid. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
942 inline bool par_mark_and_count(oop obj, size_t word_size, uint worker_id); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
943 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
944 // Unconditionally mark the given object, and unconditinally count |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
945 // the object in the counting structures for worker id 0. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
946 // Should *not* be called from parallel code. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
947 inline bool mark_and_count(oop obj, HeapRegion* hr); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
948 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
949 // Similar to the above routine but we don't know the heap region that |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
950 // contains the object to be marked/counted, which this routine looks up. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
951 // Should *not* be called from parallel code. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
952 inline bool mark_and_count(oop obj); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
953 |
|
7397
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
954 // Returns true if initialization was successfully completed. |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
955 bool completed_initialization() const { |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
956 return _completed_initialization; |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
957 } |
|
442f942757c0
8000244: G1: Ergonomically set MarkStackSize and use virtual space for global marking stack
johnc
parents:
6862
diff
changeset
|
958 |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
959 protected: |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
960 // Clear all the per-task bitmaps and arrays used to store the |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
961 // counting data. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
962 void clear_all_count_data(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
963 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
964 // Aggregates the counting data for each worker/task |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
965 // that was constructed while marking. Also sets |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
966 // the amount of marked bytes for each region and |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
967 // the top at concurrent mark count. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
968 void aggregate_count_data(); |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
969 |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
970 // Verification routine |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
971 void verify_count_data(); |
| 342 | 972 }; |
| 973 | |
| 974 // A class representing a marking task. | |
| 975 class CMTask : public TerminatorTerminator { | |
| 976 private: | |
| 977 enum PrivateConstants { | |
| 978 // the regular clock call is called once the scanned words reaches | |
| 979 // this limit | |
| 980 words_scanned_period = 12*1024, | |
| 981 // the regular clock call is called once the number of visited | |
| 982 // references reaches this limit | |
| 983 refs_reached_period = 384, | |
| 984 // initial value for the hash seed, used in the work stealing code | |
| 985 init_hash_seed = 17, | |
| 986 // how many entries will be transferred between global stack and | |
| 987 // local queues | |
| 988 global_stack_transfer_size = 16 | |
| 989 }; | |
| 990 | |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
991 uint _worker_id; |
| 342 | 992 G1CollectedHeap* _g1h; |
| 993 ConcurrentMark* _cm; | |
| 994 CMBitMap* _nextMarkBitMap; | |
| 995 // the task queue of this task | |
| 996 CMTaskQueue* _task_queue; | |
|
845
df6caf649ff7
6700789: G1: Enable use of compressed oops with G1 heaps
ysr
parents:
579
diff
changeset
|
997 private: |
| 342 | 998 // the task queue set---needed for stealing |
| 999 CMTaskQueueSet* _task_queues; | |
| 1000 // indicates whether the task has been claimed---this is only for | |
| 1001 // debugging purposes | |
| 1002 bool _claimed; | |
| 1003 | |
| 1004 // number of calls to this task | |
| 1005 int _calls; | |
| 1006 | |
| 1007 // when the virtual timer reaches this time, the marking step should | |
| 1008 // exit | |
| 1009 double _time_target_ms; | |
| 1010 // the start time of the current marking step | |
| 1011 double _start_time_ms; | |
| 1012 | |
| 1013 // the oop closure used for iterations over oops | |
| 3771 | 1014 G1CMOopClosure* _cm_oop_closure; |
| 342 | 1015 |
| 1016 // the region this task is scanning, NULL if we're not scanning any | |
| 1017 HeapRegion* _curr_region; | |
| 1018 // the local finger of this task, NULL if we're not scanning a region | |
| 1019 HeapWord* _finger; | |
| 1020 // limit of the region this task is scanning, NULL if we're not scanning one | |
| 1021 HeapWord* _region_limit; | |
| 1022 | |
| 1023 // the number of words this task has scanned | |
| 1024 size_t _words_scanned; | |
| 1025 // When _words_scanned reaches this limit, the regular clock is | |
| 1026 // called. Notice that this might be decreased under certain | |
| 1027 // circumstances (i.e. when we believe that we did an expensive | |
| 1028 // operation). | |
| 1029 size_t _words_scanned_limit; | |
| 1030 // the initial value of _words_scanned_limit (i.e. what it was | |
| 1031 // before it was decreased). | |
| 1032 size_t _real_words_scanned_limit; | |
| 1033 | |
| 1034 // the number of references this task has visited | |
| 1035 size_t _refs_reached; | |
| 1036 // When _refs_reached reaches this limit, the regular clock is | |
| 1037 // called. Notice this this might be decreased under certain | |
| 1038 // circumstances (i.e. when we believe that we did an expensive | |
| 1039 // operation). | |
| 1040 size_t _refs_reached_limit; | |
| 1041 // the initial value of _refs_reached_limit (i.e. what it was before | |
| 1042 // it was decreased). | |
| 1043 size_t _real_refs_reached_limit; | |
| 1044 | |
| 1045 // used by the work stealing stuff | |
| 1046 int _hash_seed; | |
| 1047 // if this is true, then the task has aborted for some reason | |
| 1048 bool _has_aborted; | |
| 1049 // set when the task aborts because it has met its time quota | |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1050 bool _has_timed_out; |
| 342 | 1051 // true when we're draining SATB buffers; this avoids the task |
| 1052 // aborting due to SATB buffers being available (as we're already | |
| 1053 // dealing with them) | |
| 1054 bool _draining_satb_buffers; | |
| 1055 | |
| 1056 // number sequence of past step times | |
| 1057 NumberSeq _step_times_ms; | |
| 1058 // elapsed time of this task | |
| 1059 double _elapsed_time_ms; | |
| 1060 // termination time of this task | |
| 1061 double _termination_time_ms; | |
| 1062 // when this task got into the termination protocol | |
| 1063 double _termination_start_time_ms; | |
| 1064 | |
| 1065 // true when the task is during a concurrent phase, false when it is | |
| 1066 // in the remark phase (so, in the latter case, we do not have to | |
| 1067 // check all the things that we have to check during the concurrent | |
| 1068 // phase, i.e. SATB buffer availability...) | |
| 1069 bool _concurrent; | |
| 1070 | |
| 1071 TruncatedSeq _marking_step_diffs_ms; | |
| 1072 | |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
1073 // Counting data structures. Embedding the task's marked_bytes_array |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
1074 // and card bitmap into the actual task saves having to go through |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
1075 // the ConcurrentMark object. |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
1076 size_t* _marked_bytes_array; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
1077 BitMap* _card_bm; |
|
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
1078 |
| 342 | 1079 // LOTS of statistics related with this task |
| 1080 #if _MARKING_STATS_ | |
| 1081 NumberSeq _all_clock_intervals_ms; | |
| 1082 double _interval_start_time_ms; | |
| 1083 | |
| 1084 int _aborted; | |
| 1085 int _aborted_overflow; | |
| 1086 int _aborted_cm_aborted; | |
| 1087 int _aborted_yield; | |
| 1088 int _aborted_timed_out; | |
| 1089 int _aborted_satb; | |
| 1090 int _aborted_termination; | |
| 1091 | |
| 1092 int _steal_attempts; | |
| 1093 int _steals; | |
| 1094 | |
| 1095 int _clock_due_to_marking; | |
| 1096 int _clock_due_to_scanning; | |
| 1097 | |
| 1098 int _local_pushes; | |
| 1099 int _local_pops; | |
| 1100 int _local_max_size; | |
| 1101 int _objs_scanned; | |
| 1102 | |
| 1103 int _global_pushes; | |
| 1104 int _global_pops; | |
| 1105 int _global_max_size; | |
| 1106 | |
| 1107 int _global_transfers_to; | |
| 1108 int _global_transfers_from; | |
| 1109 | |
| 1110 int _regions_claimed; | |
| 1111 int _objs_found_on_bitmap; | |
| 1112 | |
| 1113 int _satb_buffers_processed; | |
| 1114 #endif // _MARKING_STATS_ | |
| 1115 | |
| 1116 // it updates the local fields after this task has claimed | |
| 1117 // a new region to scan | |
| 1118 void setup_for_region(HeapRegion* hr); | |
| 1119 // it brings up-to-date the limit of the region | |
| 1120 void update_region_limit(); | |
| 1121 | |
| 1122 // called when either the words scanned or the refs visited limit | |
| 1123 // has been reached | |
| 1124 void reached_limit(); | |
| 1125 // recalculates the words scanned and refs visited limits | |
| 1126 void recalculate_limits(); | |
| 1127 // decreases the words scanned and refs visited limits when we reach | |
| 1128 // an expensive operation | |
| 1129 void decrease_limits(); | |
| 1130 // it checks whether the words scanned or refs visited reached their | |
| 1131 // respective limit and calls reached_limit() if they have | |
| 1132 void check_limits() { | |
| 1133 if (_words_scanned >= _words_scanned_limit || | |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1134 _refs_reached >= _refs_reached_limit) { |
| 342 | 1135 reached_limit(); |
|
3776
23d434c6290d
7055073: G1: code cleanup in the concurrentMark.* files
tonyp
parents:
3772
diff
changeset
|
1136 } |
| 342 | 1137 } |
| 1138 // this is supposed to be called regularly during a marking step as | |
| 1139 // it checks a bunch of conditions that might cause the marking step | |
| 1140 // to abort | |
| 1141 void regular_clock_call(); | |
| 1142 bool concurrent() { return _concurrent; } | |
| 1143 | |
| 1144 public: | |
| 1145 // It resets the task; it should be called right at the beginning of | |
| 1146 // a marking phase. | |
| 1147 void reset(CMBitMap* _nextMarkBitMap); | |
| 1148 // it clears all the fields that correspond to a claimed region. | |
| 1149 void clear_region_fields(); | |
| 1150 | |
| 1151 void set_concurrent(bool concurrent) { _concurrent = concurrent; } | |
| 1152 | |
| 1153 // The main method of this class which performs a marking step | |
| 1154 // trying not to exceed the given duration. However, it might exit | |
| 1155 // prematurely, according to some conditions (i.e. SATB buffers are | |
| 1156 // available for processing). | |
|
8787
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8733
diff
changeset
|
1157 void do_marking_step(double target_ms, |
|
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8733
diff
changeset
|
1158 bool do_termination, |
|
fa08949fe0cb
8009536: G1: Apache Lucene hang during reference processing
johnc
parents:
8733
diff
changeset
|
1159 bool is_serial); |
| 342 | 1160 |
| 1161 // These two calls start and stop the timer | |
| 1162 void record_start_time() { | |
| 1163 _elapsed_time_ms = os::elapsedTime() * 1000.0; | |
| 1164 } | |
| 1165 void record_end_time() { | |
| 1166 _elapsed_time_ms = os::elapsedTime() * 1000.0 - _elapsed_time_ms; | |
| 1167 } | |
| 1168 | |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
1169 // returns the worker ID associated with this task. |
|
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
1170 uint worker_id() { return _worker_id; } |
| 342 | 1171 |
| 1172 // From TerminatorTerminator. It determines whether this task should | |
| 1173 // exit the termination protocol after it's entered it. | |
| 1174 virtual bool should_exit_termination(); | |
| 1175 | |
|
3378
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3316
diff
changeset
|
1176 // Resets the local region fields after a task has finished scanning a |
|
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3316
diff
changeset
|
1177 // region; or when they have become stale as a result of the region |
|
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3316
diff
changeset
|
1178 // being evacuated. |
|
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3316
diff
changeset
|
1179 void giveup_current_region(); |
|
69293e516993
7041440: G1: assert(obj->is_oop_or_null(true )) failed: Error #
johnc
parents:
3316
diff
changeset
|
1180 |
| 342 | 1181 HeapWord* finger() { return _finger; } |
| 1182 | |
| 1183 bool has_aborted() { return _has_aborted; } | |
| 1184 void set_has_aborted() { _has_aborted = true; } | |
| 1185 void clear_has_aborted() { _has_aborted = false; } | |
|
2174
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1186 bool has_timed_out() { return _has_timed_out; } |
|
234761c55641
6608385: G1: need to support parallel reference processing
johnc
parents:
2152
diff
changeset
|
1187 bool claimed() { return _claimed; } |
| 342 | 1188 |
| 3771 | 1189 void set_cm_oop_closure(G1CMOopClosure* cm_oop_closure); |
| 342 | 1190 |
| 1191 // It grays the object by marking it and, if necessary, pushing it | |
| 1192 // on the local queue | |
| 3771 | 1193 inline void deal_with_reference(oop obj); |
| 342 | 1194 |
| 1195 // It scans an object and visits its children. | |
| 3771 | 1196 void scan_object(oop obj); |
| 342 | 1197 |
| 1198 // It pushes an object on the local queue. | |
| 3771 | 1199 inline void push(oop obj); |
| 342 | 1200 |
| 1201 // These two move entries to/from the global stack. | |
| 1202 void move_entries_to_global_stack(); | |
| 1203 void get_entries_from_global_stack(); | |
| 1204 | |
| 1205 // It pops and scans objects from the local queue. If partially is | |
| 1206 // true, then it stops when the queue size is of a given limit. If | |
| 1207 // partially is false, then it stops when the queue is empty. | |
| 1208 void drain_local_queue(bool partially); | |
| 1209 // It moves entries from the global stack to the local queue and | |
| 1210 // drains the local queue. If partially is true, then it stops when | |
| 1211 // both the global stack and the local queue reach a given size. If | |
| 1212 // partially if false, it tries to empty them totally. | |
| 1213 void drain_global_stack(bool partially); | |
| 1214 // It keeps picking SATB buffers and processing them until no SATB | |
| 1215 // buffers are available. | |
| 1216 void drain_satb_buffers(); | |
|
4787
2ace1c4ee8da
6888336: G1: avoid explicitly marking and pushing objects in survivor spaces
tonyp
parents:
4728
diff
changeset
|
1217 |
| 342 | 1218 // moves the local finger to a new location |
| 1219 inline void move_finger_to(HeapWord* new_finger) { | |
|
1023
11d4857fe5e1
6888619: G1: too many guarantees in concurrent marking
tonyp
parents:
1019
diff
changeset
|
1220 assert(new_finger >= _finger && new_finger < _region_limit, "invariant"); |
| 342 | 1221 _finger = new_finger; |
| 1222 } | |
| 1223 | |
|
6862
8a5ea0a9ccc4
7127708: G1: change task num types from int to uint in concurrent mark
johnc
parents:
6812
diff
changeset
|
1224 CMTask(uint worker_id, ConcurrentMark *cm, |
|
4836
d30fa85f9994
6484965: G1: piggy-back liveness accounting phase on marking
johnc
parents:
4828
diff
changeset
|
1225 size_t* marked_bytes, BitMap* card_bm, |
| 342 | 1226 CMTaskQueue* task_queue, CMTaskQueueSet* task_queues); |
| 1227 | |
| 1228 // it prints statistics associated with this task | |
| 1229 void print_stats(); | |
| 1230 | |
| 1231 #if _MARKING_STATS_ | |
| 1232 void increase_objs_found_on_bitmap() { ++_objs_found_on_bitmap; } | |
| 1233 #endif // _MARKING_STATS_ | |
| 1234 }; | |
| 1972 | 1235 |
|
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1236 // Class that's used to to print out per-region liveness |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1237 // information. It's currently used at the end of marking and also |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1238 // after we sort the old regions at the end of the cleanup operation. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1239 class G1PrintRegionLivenessInfoClosure: public HeapRegionClosure { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1240 private: |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1241 outputStream* _out; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1242 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1243 // Accumulators for these values. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1244 size_t _total_used_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1245 size_t _total_capacity_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1246 size_t _total_prev_live_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1247 size_t _total_next_live_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1248 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1249 // These are set up when we come across a "stars humongous" region |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1250 // (as this is where most of this information is stored, not in the |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1251 // subsequent "continues humongous" regions). After that, for every |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1252 // region in a given humongous region series we deduce the right |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1253 // values for it by simply subtracting the appropriate amount from |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1254 // these fields. All these values should reach 0 after we've visited |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1255 // the last region in the series. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1256 size_t _hum_used_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1257 size_t _hum_capacity_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1258 size_t _hum_prev_live_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1259 size_t _hum_next_live_bytes; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1260 |
|
10290
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
9076
diff
changeset
|
1261 // Accumulator for the remembered set size |
|
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
9076
diff
changeset
|
1262 size_t _total_remset_bytes; |
|
05a17f270c7e
8014240: G1: Add remembered set size information to output of G1PrintRegionLivenessInfo
tschatzl
parents:
9076
diff
changeset
|
1263 |
| 12080 | 1264 // Accumulator for strong code roots memory size |
| 1265 size_t _total_strong_code_roots_bytes; | |
| 1266 | |
|
2435
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1267 static double perc(size_t val, size_t total) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1268 if (total == 0) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1269 return 0.0; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1270 } else { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1271 return 100.0 * ((double) val / (double) total); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1272 } |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1273 } |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1274 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1275 static double bytes_to_mb(size_t val) { |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1276 return (double) val / (double) M; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1277 } |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1278 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1279 // See the .cpp file. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1280 size_t get_hum_bytes(size_t* hum_bytes); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1281 void get_hum_bytes(size_t* used_bytes, size_t* capacity_bytes, |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1282 size_t* prev_live_bytes, size_t* next_live_bytes); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1283 |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1284 public: |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1285 // The header and footer are printed in the constructor and |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1286 // destructor respectively. |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1287 G1PrintRegionLivenessInfoClosure(outputStream* out, const char* phase_name); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1288 virtual bool doHeapRegion(HeapRegion* r); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1289 ~G1PrintRegionLivenessInfoClosure(); |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1290 }; |
|
371bbc844bf1
7027766: G1: introduce flag to dump the liveness information per region at the end of marking
tonyp
parents:
2174
diff
changeset
|
1291 |
| 1972 | 1292 #endif // SHARE_VM_GC_IMPLEMENTATION_G1_CONCURRENTMARK_HPP |